The main oxides formed on combustion of Li, N | vedclass

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(B) When alkali metals are heated in excess of air,they form different types of oxides based on their size and polarizability:$1$. Lithium forms the m

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$Li_2O, Na_2O_2$ and $KO_2$

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(B) When alkali metals are heated in excess of air,they form different types of oxides based on their size and polarizability:$1$. Lithium forms the monoxide: $4Li + O_2 \longrightarrow 2Li_2O$$2$. Sodium forms the peroxide: $2Na + O_2 \longrightarrow Na_2O_2$$3$. Potassium forms the superoxide: $K + O_2 \longrightarrow KO_2$Thus,the correct sequence is $Li_2O, Na_2O_2$ and $KO_2$.

The main oxides formed on combustion of $Li, Na$ and $K$ in excess of air are,respectively:

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